DE2028102A1 - Process for the protection of flat glass - Google Patents

Description

PATENT Attorneys ^ .4OZ9 I 02

DR. MOLLER-BORE ■ DR. MANITZ · DR. DEUFEL;

DIPL.-ING. FINSTERWALD DIPL.-ING. GRÄMKOW 8MONCHENZZ ₁ ROBERT-KOCH-STaI
TELEPHONE 225110

2 Oct. 9, 1970

Lo / th - J

ISSTITÜT MSHOSHL OT VERRE A.ß.BL Boulevard TJefontaine, 10, 6000 Charleroi, Belgium

Process for the protection of flat glass

Priority * Great Britain June 12, 1969 "'ITr. 29 888/69

The invention relates to a method to protect a surface of a pane of glass or a glass ribbon from damage or contamination during transport or industrial processing and, in particular, it relates to the production of glass mirrors

The manufacture of glass mirrors includes «a sequence of operations ntfwi 1 oh ice preparatory · washing of the silver-plating glass surface, the deposition of silver» and

ORIGINAL COPY

109801/2082

Copper coatings, the drying of the metallic layers and the application of a protective paint layer, followed by drying and baking

The coating materials for the formation of the Ketall- and Protective color reports are usually sprayed in Condition applied, and certain slopes of these materials are placed on the conveyor, by means of which the glass sheets through the successive treatment stations the production line on its underside, d. H. the non-silvered surfaces of the glass panes, carried and guided are deposited · At the end of the production line, the non-silvered surfaces cleaned · The cleaning operation concludes the treatment of the glass with a detergent, e.g. a suspension of lime or an iron (III) chloride solution, using malt or brushes a »

It has been proposed to protect the lower surfaces of the glass panes during the spray paint application of their upper surfaces by means of paper webs which are unrolled between the glass panes and the supporting conveyor belt or belts ! Äsungen or suspensions sum purpose coat su · the reduction of the adhesion of paint to surfaces such wnft by their #innf <rfo U * ftw fl # Beinigusg su easier. None of these previously proposed working methods for protection provide sufficient protection for the undersides of the glass panes during the metallization and paint application stages so that "cleaning of the underside of the pane at the end of the production line can be made easier".

• 2 -

BATH ORIGINAL

109801/2082

The invention provides a method of protection which can be applied to the mirror setting in such a way that this cleaning process is omitted

The invention relates to a method for schute at least a surface of a pane of glass or a ribbon of glass Damage and pollution, and the procedure records is characterized in that at least one coating composition for the formation of a protective skin is applied to the surface or membrane, which can be peeled off the glass when protection is no longer necessary. The invention also relates to any sheet of glass or any ribbon of glass that is placed on at least one its surfaces have an adhesive protective skin or membrane that can be peeled off the glass · I

The peelable skin or membrane can provide some protection of the glass surface against damage from frictional contact with other surfaces, and the invention can be usefully applied in any cases in which it is desirable to protect one or both surfaces of a sheet of glass or a ribbon of glass from damage by contact with other bodies, e.g. during the transport of the glass to protect. The skin can also protect the glass surface from harmful changes Protect chemical exposure to a substance in the atmosphere. Thus the invention can be applied, g around one or both surfaces of a pane of glass or a ribbon of glass during transport or storage to protect in a very humid atmosphere. However, the invention is intended primarily in the manufacture of mirrors can be used to protect the non-silvered surfaces of the glass not only from mechanical damage but also from contamination during transport of the glass through the metallization and paint application stations of Protect production line.

BATH ORIGINAL

103808/2062.

In carrying out the Haßsenherstellung, wherein a tape or Geheibe of glass is performed continuously by one or more treatment budget ions / are, it is preferable that tragvor forming the membrane composition or Siusanmensetssuiigea through to "apply ^directions: soft along dm>! feansfportstraB® are arranged, eo that the ribbon © der Jude © i »E @ lm® disc successively with äi @ sex> Z« Bisim © Bf§ © tei2Hg taPasrexid des

Passing »in front of such a device will · At / a device- s * S _e « fish; » d®n glass transport at itiji, at which. © »dae.

woria di · -aack efe @ a g ««. a4t # ObQ ^ flä © 2ä, Q "äQS © M-sos as

preparation aur

wji ^ - ^ "o ^ ca £ © © © dos ¹

_, (_ 1 Lr Jj:: J, iSä \ 3 ₀ ^t! 5S ^: SC ¹ QD ÄS G

BATH ORIGINAL

organic solvents or a mixture of solvents, z · B, one or more of the following solvents! Butyl acetate, methyl isobutyl acetone, methylene chloride, methoxyhescanon, ethyl acetate and methyl ethyl acetone, is dissolved, contains.

Alternatively, the desired protective skin according to the invention can be achieved by applying coating compositions are formed, which comprise components that are in situ with the formation of a substance »which forms the skin, react. For example, the skin can be separated by Application on the one hand of a solution of a partially polymerized polyester resin and a bearer for such a resin Resin * and on the other hand a solution containing another amount of the partially pulverized polyester resin and one Accelerator to promote the further polymerization of the Resin can be formed on the glass · A suitable, partially polymerized polyester for use at such a construction sforta is a polyester that is iron is derived from a polyvalent glycol and maleic acid, and cobalt naphthenate or · cyclohexane peroxide can be used as Polymerization «beechl« uniger and «harder can be used for the resin.

The skin is removable as a whole by attaching it to a tape or is preferably lifted and pulled by an edge. Evaporation of the solvent or solvents can be accelerated by warming the applied composition Subject to air currents or intermittent blasts of hot air will.

The membrane forming composition can be applied by a roll coater, i.e. putting the glass with its lower surface · in contact with a partially in

-5-

BATH

109808/2062

immersed a reservoir of the coating composition Roller is moved forward

Certain embodiments of the invention are exemplary explained in the schematic figures of the drawing.

Fig. 1 seigt two application orphan 1 ₉ which are partially immersed in ein® supply held in a container 2 Anetr ± chstoff ~ Kusammensetzung * The container and Auftragwalsen are between ₉ to eiaanderfolg®ad®a ASG tri @ @ H beBifl rollers of a Walsenfördarera such "aBge®r & i» t, & a £ the - upper sides of the Auftrepfalsen look in the valley Eben © as dl · Wl eheten. Feilo

The regret parts of it,

in the upper rope dee

serves the Vorwaechstation to treiiepoptiexm "w © the GlaeeGheiben B in BloSrtuag dee arrow top, flacfeea, - are ■ the discs as Vorbereittmg for di © Ve ^ siÄenag g @ i®s € fe" sa, uad if the glass pane Yes, contact »it ckö Malsem are brought, this® orphans wear eime loe ^ isSrfeffiss d®8 coating material on di® nach imtem gowa» ät «B (skim over the window on · the paint cover% dxd eofört 'by means of a stream of hotter uft trodmet, which is delivered in the container 2 adjacent Bohr 4Biss * nete coating material forms a membrane, which led the glass at the end of the mirror "production road _$ d" Iu Bach the stages of pre-washing, the silver plating , the ¥ «r3Eupfexus @ and the paint application can be sucked off

Figures 2 and 3 relate to an alternate mode of operation and apparatus, and are in broken elevation or a view from one end

BAD OBfGfNAL

109808/2062

In this alternative device, the application device for the paint is in the form of a fixed bore 5, which has a longitudinal outflow slot 6 in its circumference and is connected at one end to a container 7 via a line 8 and a pump 9 pump drives the BescMchtungszusammensetzung from & m container? into the boring 5 so that the composition is continuously discharged from the slits 6, and the slices, e.g. the disk S, are transported over the boring with the aid of the rollers R of a Walsen conveyor. The ear 5 is arranged in this way that his Ausflußschlitz 6 sichgecm & e under "half of the downwardly directed surface of a (springs glass sheet as it passes over the drilling, is" where you -Spalt between this surface and the Schlits m Jet, 4 * B, the gap of a "power the JeschiehtiaagszueameaBetwase Bridges is that / extends "the Ausflußschlit ii WM" in opposite Bichtnsg "and adheres to the glass · 11"'Henge the aurchgiipuiipten through the slot 6 FMnsigteit int .Large than that of di »glass adheres» lie FBTR ^ A large amount of liquid drips into the container? -Susfteko Bi. «A Kenge" of the coating liquid applied to the glass depends on the viscosity of the liquid medium imi. The speed of the displacement dt r 01 & β8 € ΐ1ι «11» Θ & h ₉ it depends, however. only teÜmKüra from the dai Crlae irom the separating distance «b» Itr? lu & dtr BesdiiclitaiieiiiBii & ii eposition in the- Queaa? iAttme'd # J? Bchtilbta S becomes tiusob. lO.begr ^ enjBt what * -ψολ the casualty & g 4 · ® lolre® 5 »just 4tm floor of his Aunia & SiMltsde tezvarsfigcit" lie IiieelgLaift flows -in "imern tontiiaiiei'llcÄeiti lean in oil engia the zn twnft · - fläeh» · ABdura eaigeteickti fA ¹ IiIfe -lie flliui ^ eit such a «Qfceril & eM wad ₉ ^ mvm der Οί» ϋ inuolBe tea resistances »and tar B ^ mmAsmit sn lull siiiit or breaks ·" ■■. ■■.

BATH ORIGINAL

ΐ'θ'98Ο0λ2Ο62 -

A continuous coating of the composition is applied to the downward facing surfaces of the glass sheets. The composition can e.g. B. a solution β which comprises 50% by weight of polyvinyl chloride, 20% by weight of butyl acetate and 50% by weight of methylene chloride, this solution dries to form a peelable skin on the glass pane dried at 90 ° C ₉ , which are arranged against the coating of iron 11 and 12, which are arranged in the direction of movement downwards from the R © ta 5 in a position between this drilling and the next Walsso E ä & m conveyor! Blower 13 is supplied to the nozzles and it is preferably heated ₉ Z ₀ B by means of a heater 14 «

As already stated © s © "beisfallo m8gli © h ₉ © in®

contains: "& 1 · suaamen in situ uat" skin react "or GeteGBÄt deliver" weldte miteinsMe? yoeglOEem ₉ wa

1 »letasteroa rollo IsisMaoi QIo

Sine 7oxapichfeüE ^ νλο do in ^ os? wurd # _t chews, act '' Li I s ©

only at ter Fpilc ^ c ÜIx3 ° 6tol! l'üG3 cöcIcisg

not

BATH ORIGINAL

Paths is ejected as described with reference to Fig. 2, limited by two parallel rods or rollers spaced a short distance apart · The rods or Rolls can be movable relative to one another, us the gap width between them, i. H. the levy slot to vary.

The invention also relates to a method for mirror production, in which panes of glass in flat-lying positions successively by metallization and paint application stations in which the Metallized upward facing surfaces of the discs and provided with a color, which is characterized by the fact that in the course of this TSsderas and before it is reached • of the ketallization, the upper * surface of each of these panes from damage or wasting The invention also relates to a method for mirrors. production, whereby dl · protective skin as a whole «» through Lifting and pulling at one corner of the build is removed when the schute's downward facing surface is each the discs do not need to be stored »

-Patent application - -9- 109801/2082

BATH ORIGINAL

Claims (1)

Claims 1. Procedure to create a surface bucket Disc or tape made of glass from damage or Pollution, characterized » that on this surface at least one Besohichtui ^ e " eusaomense'tsune to the formation of a bullet skin «ufgebrachli which can be sucked in by the glass «whom Protection is no longer required. 2 »Method according to A & spsuch 1, thereby g t k θ a & § ι i β net _f that a process will be created which contains at least one organic, Compound contains, di® in at least one »volatile Solvent dissolved 1st 3 · The method of claim 2, characterized $ ® © k 'sa% © 1 h β "· net that else is Beschiehtungssasaameneetiiyns containing a · Iiöaaag a" filmbildend® "sates. 4 «method according to claim 3« thereby giki n · t that a Beoohiohtungssueasmimevtsu ^ becomes, which · a solution of an OepolgfMzieat ·· of acetate and a vinyl ester * of an acid with Includes chain. 5 · Method according to claim 3, characterized in that it is gtkift Nice tune for a visit which is a · solution of Bolyvingachloride «e & th · ORIGINAL BATHROOM - 10 - 109808/2062 6. Terfahren according to claim 1, characterized in that that coating compositions on the glass. which contain components that react in situ to form a skin-forming substance I et? · Retracts, according to any one of the preceding claims, characterized g · k · η η% β η, that the applied coating on the glass is dried by the applied ^ Coating is exposed to at least one stream of heated air. 8 »Method according to one of the preceding claims, characterized g e k β η η ζ e i c h η e t that the protective skin on the downward facing surface of the disc or the Band of glass is formed while this is in a flat position by means of conveyors goalkeeper is moved· 9. Application of the method according to one of Claims 1 to 8 sur Manufacture of mirrors, with panes of glass In lying flat position consecutively by Metelli " eation and work application stations are carried out at what M.® upward facing surfaces of the discs are metallized and be provided with paint, whereby in the course of the I Killer \ ind dead of the metallization station the naeli. facing surface of each disc from or contamination with a peelable skin 10 »Application according to claim 9, whereby the protective hip hat as Whole by lifting and pulling a corner of the skin with »<gexogen if the protection of the downward facing surface of each disc is not mine? is needed « 11 disk or tape ame glass, characterized geki & azeic 'et _t that unites n on at least one Fläck * BATH ORIGINAL Adhesive, beta-chute-end structures, which -from the glass will kszua, wear BATH ORIGINAL - 12 - 10.9808 / 2062